6.8 Western vs 30 XC
A to-scale size comparison of the 6.8 Western and the 30 XC, drawn from SAAMI and C.I.P. cartridge dimensions and aligned at the case head.
6.8 Western (left) beside 30 XC (right), shown at the same scale.
The 6.8 Western has an overall length of about 2.96″ with a 0.278″ bullet. The 30 XC runs about 4.21″ on a 0.308″ bullet. That makes the 30 XC about 1.4x the overall length of the 6.8 Western. See the full reference for each: 6.8 Western and 30 XC.